I've run full synthetic for every fluid in every car I've owned for past ten years or so. I don't really think synthetic oil is prone to leaking, though it does clean out deposits around seals and I do see a lot of people who run 0 or 5 W synthetic who complain about leaks. I would think 0 or 5 W conventional oil would leak, too. I don't like running oil lower than 15 W.

I've used the blue replacement gaskets from Uncle Kent for the valve cover and fuel filler cap gaskets--mostly for the fuel filler cap because I run biodiesel. I wish someone would come out with a biodiesel-compatible fuel filler gasket so mine would stop melting.

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Stop paying for animal enslavement, cruelty, and slaughter. Save your health and the planet. Go vegan! I did 18 years ago. https://challenge22.com/

DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles